Originally Posted by MT1977

Good Day,

What is the minimum belt conveyor length at which we must apply turnover stations? Is there a limit for this in the international codes?

Thank you!

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If by turnover stations you mean transfer points on conveyor belts to connect one belt flight to the next-

The conveyor belts useable length being its ma and ■

Or does he mean turning the returning belt through 180 degrees so the "clean" side of the belt is running on the return idlers■

Originally Posted by MT1977

Good Day,

What is the minimum belt conveyor length at which we must apply turnover stations? Is there a limit for this in the international codes?

Thank you!

===========================================================

It is not that simple a question to get the answer,

What are you wishing to convey?

If by turnover stations you mean transfer points on conveyor belts to connect one belt flight to the next or terminate at surge piles silos bins etc.

The conveyor belts useable length is its maximum distance to carry ore from a to b with one drive unit at its mid-point used to move the bottom belt or a conveyor belt drive unit at the transfer point or head end of a conveyor.

For example the mine I worked in uses a 36 and 42 inch belt for most of its transfer of halite. the maximum distance for one 36 inch drive unit delivering run of mine halite ore was 3000 feet at its maximum

Many conveyors have belt flights many miles or kilometers long in current use

You need to give us more information simply because your question and its related answers can be so broad in scope as it contains and is related to:

1.belt routing-what is the terrain-is the belt underground or on the surface.

(a) horizontal conveyor belt flights/with curves in route or not.

(b) inclined belt flights

(c) ore weights/ore types

(d) desired tonnage per hour if known

(e) the belt size- meaning width if known.

(f) belt grade and thickness

(g)budgeted cost versus actual expenses.

You should investigate the www.CEMA.org web site for answers about conveyors.

or look at the forum home page for more information regarding conveyors.

lzaharis ■

1) I hope he isn't using answers from this forum as the only guide to designing belt conveyors If you ask the wrong question you'll get the wrong answer.

2) Why is there an apparent assumption in so many questions posted that all answers are contained in codes/standards ■

I also interpret turnovers as reversing the return strand profile but Mr Spriggs can confirm the distance precisely. ■

Originally Posted by MT1977

2) Codes and standards are the first place, where you can search for a trusty guideline. If the required guideline is not defined by an international code, then it will be subject for study.

Regrettably I have found that that in bulk materials handling many "International Codes and Standards" are lamentably out of date with the current state of knowledge which resides with those who actually design, build and install bulk materials handling equipment ■

Originally Posted by MT1977

Dear designer,

Thank you for your cooperation.

1) I don't imagine that there is a designer who can be guided by opinions in forums.

2) Codes and standards are the first place, where you can search for a trusty guideline. If the required guideline is not defined by an international code, then it will be subject for study.

To 1) Why bother with the forums then?

to 2) Standards are being revised all the time.

I remember when the British Standard for pipe flanges came out in the late 1970's using non-preferred bolts/studs for the pipe size used to carry most of the world's water supplies. No subject for study there!

In another case I was unable to impose a minimum sheave size because previous Consultants had called up conflicting Standards in their lengthy specification. Yet again, petrochemically, I was apprehensive about referring to 26 Standards for the project specification..until I got in work the following morning & found that the younger permanent staff had banged up the content to 166 Standards overnight. Bidders refused to entertain the resulting paperwork & the job fell through.

I could go on & probably am!

If there isn't off the shelf software for a Standard then it probably isn't being taken all that seriously. Take it from someone who has scoured most of the known software emporiums of SE Asia. (should that be emporia?)

But::Only ISO Standards are international, so, no, there is no standard limit. The minimum centre distance will therefore be twice the belt manufacturers' recommended turnover length plus one return idler pitch. Is that long enough?...and I don't mean this reply. ■